PYREX 250 ml Round Bottom Flask Vertical 3-Neck 24/40 Outer Joint - Lot of 2 Flasks

Reliable Multi-Neck Design for Complex Distillations and Extractions

Elevate your laboratory's synthesis capabilities with this set of two (2) Pyrex 4960-250 Round Bottom Flasks. With a 250 mL capacity and a specialized vertical 3-neck configuration, these flasks are engineered for demanding applications that require the simultaneous use of multiple vertical components, such as overhead stirrers, dropping funnels, and reflux condensers.

Unlike angled 3-neck flasks, this 4960 series features parallel (vertical) necks. This design provides straight-drop access into the flask body, making it ideal for the precise addition of reagents and optimal seating of stirrer shafts. Manufactured from Corning's legendary Code 7740 borosilicate glass, these flasks deliver the exceptional thermal stability and chemical resistance that generations of scientists have come to rely on.

Key Features & Benefits

• Vertical 3-Neck Configuration: All three necks run parallel to one another, providing direct, vertical access into the flask for overhead stirring assemblies and straight-drop addition funnels.
• Universal Compatibility: Each neck is equipped with a precision-tooled 24/40 Standard Taper outer joint, ensuring a secure, leak-free fit with a wide array of standard laboratory glassware.
• Legendary Pyrex Durability: Crafted from low-expansion Code 7740 borosilicate glass, designed to withstand rigorous heating, sudden thermal shock, and harsh chemical environments.
• Uniform Heat Distribution: The spherical round-bottom geometry maximizes contact with heating mantles, promoting efficient and even heat transfer while preventing hot spots.

Technical Specifications